Armadillo1 wrote:

preliminary report
https://mak-iac.org/rassledovaniya/rrj- ... 9//#117091

mirror
https://aviaforum.ru/threads/katastrofa ... st-2436206


in short:
captain could not keep plane in smooth flight before landing (+-200ft oscillation, 40grad banking, etc)
just before landing he performed input to max joystick angles up and down with some waiting at max positions.

first touch was about angle=0 on all 3 landing gear and up rotation (angle speed)
week elements of landing gear were cut off on 2nd touch, and gears was broken on 3nd touch


engines reverse was engaged on 2nd touch but no throtle because of bouncing
after this engines control was lost due damage and engines not responding on input

extinguishers balloons still full (not emptied)

captain could not keep plane in smooth flight before landing (+-200ft oscillation, 40grad banking, etc)

T4thH wrote:

Armadillo1 wrote:

preliminary report
https://mak-iac.org/rassledovaniya/rrj- ... 9//#117091

mirror
https://aviaforum.ru/threads/katastrofa ... st-2436206


in short:
captain could not keep plane in smooth flight before landing (+-200ft oscillation, 40grad banking, etc)
just before landing he performed input to max joystick angles up and down with some waiting at max positions.

first touch was about angle=0 on all 3 landing gear and up rotation (angle speed)
week elements of landing gear were cut off on 2nd touch, and gears was broken on 3nd touch


engines reverse was engaged on 2nd touch but no throtle because of bouncing
after this engines control was lost due damage and engines not responding on input

extinguishers balloons still full (not emptied)

Code: Select all

captain could not keep plane in smooth flight before landing (+-200ft oscillation, 40grad banking, etc)

This sounds like, something really bad was going on, the stearing/controls of the bird heavily damaged and the bird nearly doomed e.g.
Seems more, it is a miracle, that the jet has reached and crashed on the runway and has not ended up already several km prior on a field.

mtzguerrero wrote:

T4thH wrote:

Armadillo1 wrote:

preliminary report
https://mak-iac.org/rassledovaniya/rrj- ... 9//#117091

mirror
https://aviaforum.ru/threads/katastrofa ... st-2436206


in short:
captain could not keep plane in smooth flight before landing (+-200ft oscillation, 40grad banking, etc)
just before landing he performed input to max joystick angles up and down with some waiting at max positions.

first touch was about angle=0 on all 3 landing gear and up rotation (angle speed)
week elements of landing gear were cut off on 2nd touch, and gears was broken on 3nd touch


engines reverse was engaged on 2nd touch but no throtle because of bouncing
after this engines control was lost due damage and engines not responding on input

extinguishers balloons still full (not emptied)

Code: Select all

captain could not keep plane in smooth flight before landing (+-200ft oscillation, 40grad banking, etc)

This sounds like, something really bad was going on, the stearing/controls of the bird heavily damaged and the bird nearly doomed e.g.
Seems more, it is a miracle, that the jet has reached and crashed on the runway and has not ended up already several km prior on a field.

Could be something really bad going on or, as mentioned, lack of practice about how controls react in direct law, being used to FBW computers filtering and smoothing inputs.

Some people here has said that Russia is known for covering their autorities' and companies' responsability in a number of matters. If that is true, they will try to blame the pilots and the lightning for what happened.

lack of practice about how controls react in direct law,

YYZYYT wrote:

This really begs the question: why did the pilot not go around, as the approach was clearly not stable? In my mind this goes beyond the question of "did they have enough practice in direct law" but rather speaks to basic airmanship (again, I'm not a pilot)

Though, that begs the next question, is there any indication in the initial report that the pilots were concerned with the airworthiness of the aircraft (which might justify a decision to continue to land)?

Earlier discussions here seemed to point to a routine landing, until the oscillations/ I'd b interested in seeing if the contradicts that (there was no English version of the report linked).

YYZYYT wrote:

This really begs the question: why did the pilot not go around, as the approach was clearly not stable? In my mind this goes beyond the question of "did they have enough practice in direct law" but rather speaks to basic airmanship (again, I'm not a pilot)

Though, that begs the next question, is there any indication in the initial report that the pilots were concerned with the airworthiness of the aircraft (which might justify a decision to continue to land)?

Earlier discussions here seemed to point to a routine landing, until the oscillations/ I'd b interested in seeing if the contradicts that (there was no English version of the report linked).

bennett123 wrote:

UmKa39

Is there a translation issue here?.

N212R wrote:

YYZYYT wrote:

This really begs the question: why did the pilot not go around, as the approach was clearly not stable? In my mind this goes beyond the question of "did they have enough practice in direct law" but rather speaks to basic airmanship (again, I'm not a pilot)

Though, that begs the next question, is there any indication in the initial report that the pilots were concerned with the airworthiness of the aircraft (which might justify a decision to continue to land)?

Earlier discussions here seemed to point to a routine landing, until the oscillations/ I'd b interested in seeing if the contradicts that (there was no English version of the report linked).

We still don't know the precipitating factor(s) that started this chain of events. Seems pretty straight-forward, he did not go around because he needed to urgently get the aircraft on the ground. There was nothing routine about this flight from the moment that decision made itself manifest.

bennett123 wrote:

His description of the handling sounds like than stellar.

bennett123 wrote:

I was reading Airliner World for June 2011 and found this quote;

‘It is reasonably easy to control and I was really impressed and greatly appreciated it’s cockpit layout’

It is from Eugene Voronin, chief of the Aeroflot SSJ100 Pilots Team.

He was apparently a Trainer and therefore going to be more experienced than the average.

His description of the handling sounds like than stellar.

The captain had taken manual control of the Superjet after the lightning strike but the investigation has highlighted heavy-handed and abrupt inputs to the side-stick during the approach and touchdown.

Russia's federal Investigative Committee says that the aircraft made a rough landing, adding that the captain's actions to control the jet were "in violation of established rules" and led to the airframe damage and the outbreak of fire.

Moments before landing, wind shear alerts were given to the crew, but they did not act on such action.

The captain instead increased the required approach speed by 15 knots, with him also alternating sidestick inputs which caused the pitch to vary significantly.